Phonograph tone rectifier and amplifier



June 5, 1923. 1,457,678

I C. A. TREMAIN .I

PHONOGRAPH TONE RECTIFIER AND AMPLIFIER Filed Jan. 10 1922 Fig.1 I Fig.2

INVENTOR,

BY 43am 6%m A TTORNEY Patented June 5, 1923.

UNITED STATES CHARLES A. TREIVIAIN, OF BELLINGHAM, WASHINGTON.

PHONOGRAPH TONE RECTIFIER AND AMPLIFIER.

Application filed January 10, 1922. Serial No. 528,159.

To aZZ whom it may concern:

Be it known that I, CHARLES A. TREMAIN, a citizen of the United States,and a resident of Bellingham, in the county of lVhatcom and State of\Vashington, have invented a new and useful Phonograph Tone Rectifierand Amplifier, of which the following is a specification.

My invention relates to improvements in tone rectifiers and amplifiersfor phonographs, and the object of my improvement is to produce a simpleand inexpensive de vice which when placed between a phono graphturntable and the record thereon will improve the reproduced tone bothas to quality and volume.

I attain this object with the device illustrated in the accompanyingsheet of drawings, in which Figure l is a plan view of my device, F ig.2 is a side elevation of Fig. l, and Fig. 3 is a plan view of aphonograph turntable and reproducer with my device in operative positionthereon.

Similar characters refer to similar parts throughout. Certain parts arebroken away to shown other parts hidden thereby.

Broadly, my device comprises a thin, fiat, sonorous body adapted tointervene be tween the turntable of a phonograph and the record thereon.

More particularly: A thin circular disc 4; has a central hole a suitedto pass over the central pin of a phonograph turntable. Ra dial loops 6,6 are rigidly fastened in the periphery of of. Strings 8, 8 arestretched taut between the ends of loops 6 and the periphery of discdisc 4: to lie in the plane there-- 4 and fastened thereto. A paperwasher, one

of which is shown at 5, is fastened to each side of disc 4:. A servingof yarn is wound 40 around the outer end of-each of loops 6 at 7 7. Bypreference I make disc 4 of metal, loops 6 of spring wire and strings 8of thin piano springs. WVires 6 are soldered in saw kerfs in disc 4 andwires 8 are soldered in saw kerfs in disc 4 and also soldered to wires6. To operate as intended wires 8 must be in a taut condition.

In Fig. 3 the tone reproducer of a phonograph is shown at 9, theturntable of the same at 10, a phonograph record at 11, the turntablepin at 12 and my device in operative position between said turntable andsaid record.

lVhen constructed and used as shown and described, my device noticeablyimproves the quality and volume of the reproduced tones from theinstrument.

Somewhat louder tones can be got when the serving of yarn 7 is not usedand the record is allowed to bear directly on wires 6, but I prefer touse the yarn as shown.

Having thus disclosed my invention, what I claim is new and desire tosecure by Letters Patent is,

In a phonograph tone improver in combination a metal disc having acentral hole, a plurality of spring metal loops fastened to said disk inthe plane thereof, and a plurality of, spring steel wires stretched tautbe 7 tween said disc and said loops and fastened thereto.

CHARLES A. TREMAIN.

